On 02:22 pm, twis...@patrickmylund.com wrote:
>Hi Lee,
>
>Here is a complete example that works with Twisted 11.0. LINEMODE
>itself is enabled at connect, but it has different modes that
>determine what is sent when by the client. (See section 2.2 of
>http://www.faqs.org/rfcs/rfc1184.html)
You can manage this without a TelnetTransport subclass:
#!/usr/bin/env python
from twisted.internet.protocol import Factory
from twisted.conch.telnet import (
TelnetProtocol, StatefulTelnetProtocol, TelnetTransport)
from twisted.conch.telnet import DO, DONT, WILL, WONT
LINEMODE = chr(34)
LINEMODE_EDIT = chr(1) + chr(1)
LINEMODE_TRAPSIG = chr(1) + chr(2)
LINEMODE_MODEACK = chr(1) + chr(4)
LINEMODE_SOFTTAB = chr(1) + chr(8)
LINEMODE_LITECHO = chr(1) + chr(16)
class LineModeProtocol(TelnetProtocol):
def connectionMade(self):
print("Connection made!")
self.lines = True
# Ask client to begin sub-negotation of linemode
self.transport.do(LINEMODE)
def connectionLost(self, reason):
print("Connection lost!")
def enableRemote(self, option):
if option == LINEMODE:
# The normal (buffered) mode
self.transport.requestNegotiation(
LINEMODE, LINEMODE_EDIT)
return True
return False
def dataReceived(self, data):
if self.lines:
line = data.rstrip()
print("data received (normal): " + line)
if line == "gounbuffered":
# Only trap signals locally
self.transport.requestNegotiation(
LINEMODE, LINEMODE_TRAPSIG) self.lines
= False
else:
# manually buffer data here
print("data received (linemode): " + data)
if data == "n":
# Change to edit mode
self.transport.requestNegotiation(
LINEMODE, LINEMODE_EDIT)
self.lines = True
class LineModeFactory(Factory):
def buildProtocol(self, addr):
return TelnetTransport(LineModeProtocol)
if __name__ == '__main__':
from twisted.internet import reactor
port = 2222
factory = LineModeFactory()
reactor.listenTCP(port, factory)
reactor.run()
Jean-Paul
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